Removing Tire Marks from Car's Fender

My white car has been "kissed" by the very big tires of a 350 pickup. Needless to say the back fender is now coated with rubber from those tires. These tires actually rubbed off the paint down to primer on spots and completely off in other areas.

I am not sure if the fender is fiberglass or metal. Any ideas how to remove the black tire marks from the fender so I can repaint?

By anbsmommy from Tacoma, WA

Feedback:

Bug and Tar Remover

Go to Autozone and buy some bug and tar remover spray and wax on, wax off.

By kathleen williams

Paint Thinner

Use paint thinner. My "was-band" (my ex, hahaha) used to run a car business that did minor repairs. This is what he used on it.

By Elaine